Disha: Computer Awareness Pdf

| Device | Type | Description | |--------|------|-------------| | Keyboard | Alphanumeric | QWERTY layout; modifier keys (Ctrl, Alt, Shift) | | Mouse | Pointing | Mechanical/optical; left/right click, scroll wheel | | Scanner | Optical | Converts printed text/images to digital (OCR) | | MICR | Magnetic | Reads magnetic ink (cheque processing) | | OMR | Optical | Detects pencil marks (answer sheets) | | Barcode Reader | Laser | Reads barcode (retail) | | Biometric | Fingerprint/iris | Security authentication | | Joystick | Gaming | Analog input | | Light Pen | Direct drawing | Old CAD systems |

Computer awareness refers to the basic knowledge and understanding of computer concepts, hardware, software, and applications. It encompasses a wide range of topics, including the history of computers, types of computers, computer hardware, software, networking, and internet technologies. Computer awareness is an essential skill for anyone who wants to stay relevant in today's technology-driven world. disha computer awareness pdf

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